Generated Narrative: CodeSystem rcFB This case-sensitive code system http://terminology.hl7.org/CodeSystem/rcFB defines codes, but no codes are represented here
Paul Frosdick, NHS Information Authority
The Read Codes Four Byte Set consists of 4 alphanumeric characters. This version contains approximately 40,000 codes arranged in a hierarchical structure. Top level hierarchy sections: Disorders Findings Surgical procedures Investigations Occupations Drugs